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Prev Professional Automotive Repair Technical Discussions for July 10, 2009
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Open Help Requests for GM
Help Request Answers
1984 Chevrolet Corvette 5.7L suspension VIN: 1G1AY0787E
Thanks in advance...when driving at highway speeds the rear end feels like its shifting to the right under a hard accel and back to the left on decel . i replaced all of the control arm bushings and the transverse spring bushings due to wear and also did a 4 w...
1996 Chevrolet Blazer 4.3L starting VIN: 1GNDT13W3T
the blazer runs fine only problem is starting after the vehicle sets over night or of course longer periods of time
1996 Chevrolet C3500 7.4L fuel gauge VIN: 1GDKC34J3T
The fuel gauge needle bounces all the time. The gauge is accuarte. Have installed a tester at the purple wire from the module to the gauge and can sweep the gauge needle and there is no bounce. Tried the same test on the DK.BLU/WHT wire will sweep but bounce...
2004 Chevrolet Silverado 1500 4.8L Compressor VIN: 2GCEC19V74
Truck came to shop not cooling. Found Low side line freezing up. Added 4oz. r-134a all seemed to be ok 40 degree air out of vents. Customer picked up vehicle and came back complaining of hot air out of vents sometime. Test drove vehicle with scanner and found ...
2005 Chevrolet Trailblazer LS 4.2L feul gauge inop VIN: 1GNET16SX5
Top of the day fellow techs. this vech came in with fuel gauge not working.after test driving i found gauge to be working,but it only reads either empty or 1/8 of a tank. i dropped the tank removed sending unit.manually moved float and it regesterd better but ...
2006 Chevrolet Express 2500 4.8L Flasher Fuse VIN: 1GCGG25V86
customer keeps replacing 15 amp flasher fuse (#14) in underhood fuse block. he brought the vehicle to us. we replaced flasher module because we have seen lots of problems with those. keeps blowing fuses. takes days and sometimes weeks before blowing fuse. this...
1988 Pontiac Grand Am LE 2.5L No Start VIN: 1G2NV14U5J
car will not start unless you give it a shot of 2+2.fuel pressure is fine,fire is good.replaced regulator diagham,fuel injector,map will cough back on accel on road sometimes.have tried everything but dynamite.sure its something simple i've overlook...
2001 Pontiac Grand Am SE 2.4L Poor Idle Quality VIN: 1G2NE52T81
Engine runs rough at idle, worse when in gear & A/C on. Car runs great otherwise. Acts like bad valve timing or ignition timing. Owner say's it gradually has gotten worse. Fuel adaptive was -25LT, Cleared the memory & now adaptive is -1 to -6. No sign of ruptu...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac Eldorado Touring 4.6L Poor Idle Quality, MIL Lamp on VIN: 1G6EL1299P
Thanks for all the help guys. This one is finally fixed. Turns out the PCM was bad, but we also had a bad ISC motor. I suspect the ISC motor caused the PCM to go bad. Basically what I found was i had a constant battery voltage coming from the PCM to the ISC mo... Trouble codes: P0030.
1998 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1241W
Thank you for all of the help with this one. Ari from Ontario hit the nail on the head by suggesting taking a look at the ground splice in the wire loom under the battery. As he suggested the grounds were green and nasty. After repairing the grounds and doing ... Trouble codes: P1629 (Theft Deterrent malfunction), U1016 (Serial Communications Malfunction).
2001 Chevrolet Astro LS 4.3L Cuts out, Stall, MIL Lamp on VIN: 1GNDM19W51
Ok IATN thanks again to all that replied. After digging in to this van deeper and deeper and gathering some help from a local shop I know and trust we found out that the computer had took a dump and was feeding me all these mixed voltages at the EGR and Map wh... Trouble codes: P0405, P0404.
2004 Chevrolet Malibu LS 3.5L door locks, alarm VIN: 1G1ZT54824
spent a lot of time on this one with no answers. i expect that the theft module is acting up but don't want to throw parts at it. sent vehicle to dealer. thanks for all of your help.
2005 Chevrolet Trailblazer EXT LS 4.2L Accessories VIN: 1GNDS13S75
Thanks for all the help the customer when with a new motor. this one is fixed and gone. thanks again for your help.
1992 GMC C1500 Sierra 5.7L Hesitation, Cuts out, Stall VIN: 1GTEC14K1N
Thanks to all 19 replies. We could not have fixed this without help. After all the so called new parts were put in because of guessing, we found a bad pickup in the new distibutor. Using a scope we found the pattern on the pickup falling away at times. We repl...
1996 GMC Jimmy 4.3L vents VIN: 1GKDT13W8T
Sorry for delay in closing. It process of road testing after ac repair, the fuel pump failed. The fix for the ac unit was the "new" rotary switch which was faulty. Replaced with new unit and problem is repaired. They did warranty the switch so customer was pl...
2002 GMC Savana 3500 5.7L engine VIN: 1GDHG31R22
Bang! You guys hit it on the head again...inside of dist cap was corroded. Replaced cap and rotor, cleaned dist vents out, starting fine @ this time. Guessing that all the sitting around caused condensation to form inside cap.
1997 Oldsmobile Aurora 4.0L Cooling Systems VIN: 1G3GR62C8V
Well guy's sorry could not provide positive information but customer declined removal of head's to verify problem.he's just gonna get rid of veh.Thank's for all the help provided.Talk to ya all later,Russ.
2000 Oldsmobile Intrigue GL 3.5L Cuts out, hard start VIN: 1G3WS52HXY
Thx guys for all your help it was an ignition assembly issue.We replaced it and problem solved.Again thx for the support and quick response...Frank Trouble codes: U1064, P1626.
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